I just got the pop-up too, it is annoying and we are working at getting rid of it. In fact we already reached out to the ad hosts on Wednesday, but we haven't heard back from them, we'll be getting in touch with them again immediately in order to effectively remove this annoying ad.

I just got the BA ad too. There wasn't even a X to kill it with. In fact, after the video ended it wouldn't go away, no obvious way to kill it. I ended up closing the browser (Chrome) and starting again.